Abstract
The effect of zircon additions on cordierite stabilization, porosity and thermal shock resistance of mullite-cordierite refractories with different content of mullite and cordierite was examined. The results show that the cordierite peaks are more sharp in composites fired from 1250 ° to 1350 °C in presence of zircon addition,while in zircon-free composites cordierite decomposes at 1300 °C. The thermal shock of specimens increases by the addition of zircon, especially in the composites containing a lower cordierite phase.
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